3LKQ

Crystal Structure of HLA B*3501 in complex with influenza NP418 epitope from 1977 strain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cross-reactive CD8+ T-cell immunity between the pandemic H1N1-2009 and H1N1-1918 influenza A viruses.

Gras, S.Kedzierski, L.Valkenburg, S.A.Laurie, K.Liu, Y.C.Denholm, J.T.Richards, M.J.Rimmelzwaan, G.F.Kelso, A.Doherty, P.C.Turner, S.J.Rossjohn, J.Kedzierska, K.

(2010) Proc.Natl.Acad.Sci.USA 107: 12599-12604

  • DOI: 10.1073/pnas.1007270107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Preexisting T-cell immunity directed at conserved viral regions promotes enhanced recovery from influenza virus infections, with there being some evidence of cross-protection directed at variable peptides. Strikingly, many of the immunogenic peptides ...

    Preexisting T-cell immunity directed at conserved viral regions promotes enhanced recovery from influenza virus infections, with there being some evidence of cross-protection directed at variable peptides. Strikingly, many of the immunogenic peptides derived from the current pandemic A(H1N1)-2009 influenza virus are representative of the catastrophic 1918 "Spanish flu" rather than more recent "seasonal" strains. We present immunological and structural analyses of cross-reactive CD8(+) T-cell-mediated immunity directed at a variable (although highly cross-reactive) immunodominant NP(418-426) peptide that binds to a large B7 family (HLA-B*3501/03/0702) found throughout human populations. Memory CD8(+) T-cell specificity was probed for 12 different NP(418) mutants that emerged over the 9 decades between the 1918 and 2009 pandemics. Although there is evidence of substantial cross-reactivity among seasonal NP(418) mutants, current memory T-cell profiles show no preexisting immunity to the 2009-NP(418) variant or the 1918-NP(418) variant. Natural infection with the A(H1N1)-2009 virus, however, elicits CD8(+) T cells specific for the 2009-NP(418) and 1918-NP(418) epitopes. This analysis points to the potential importance of cross-reactive T-cell populations that cover the possible spectrum of T-cell variants and suggests that the identification of key residues/motifs that elicit cross-reactive T-cell sets could facilitate the evolution of immunization protocols that provide a measure of protection against unpredicted pandemic influenza viruses. Thus, it is worth exploring the potential of vaccines that incorporate peptide variants with a proven potential for broader immunogenicity, especially to those that are not recognized by the current memory T-cell pool generated by exposure to influenza variants that cause successive seasonal epidemics.


    Organizational Affiliation

    Protein Crystallography Unit, Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HLA class I histocompatibility antigen, B-35 alpha chain
A
276Homo sapiensMutation(s): 0 
Gene Names: HLA-B (HLAB)
Find proteins for P30685 (Homo sapiens)
Go to Gene View: HLA-B
Go to UniProtKB:  P30685
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-2-microglobulin
B
100Homo sapiensMutation(s): 0 
Gene Names: B2M
Find proteins for P61769 (Homo sapiens)
Go to Gene View: B2M
Go to UniProtKB:  P61769
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
NP418 epitope from 1977 influenza strain
C
9N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.330α = 90.00
b = 81.990β = 90.00
c = 110.420γ = 90.00
Software Package:
Software NamePurpose
Buedata collection
XSCALEdata scaling
XDSdata reduction
REFMACrefinement
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance